MIMO系统中一种新的迫零预编码方案  

New Zero-Forcing Precoding Scheme in MIMO Systems

作　　者：张艳语[1] 朱义君[1] 张水莲[1] 张永刚[2] 

机构地区：[1]信息工程大学信息工程学院 [2]91290部队

出　　处：《信息工程大学学报》2012年第1期32-36,共5页Journal of Information Engineering University

基　　金：国家科技重大专项资助项目(2009ZX03003-005;2009ZX03007-003)

摘　　要：针对传统迫零预编码无法适用于非满秩MIMO信道的问题,提出了一种新的迫零方案。通过对信道矩阵进行合适的分块,把对迫零预编码矩阵的设计转化为对两个线性方程组进行求解。该方法不要求信道矩阵满秩,其复杂度随着信道矩阵秩的增加而减少。仿真结果表明:该方案在信道满秩时与传统的迫零算法性能一致,并且与SVD预编码相比,复杂度较低,具有较好的误码率性能。In a MIMO system,the traditional zero-forcing precoder is not applicable to a rank-defi- cient channel. A new scheme of zero-forcing precoding is proposed. By properly partitioning the channel matrix, the design of zero-forcing precoders is transformed into the solution of two linear equation systems. The algorithm fits for the rank-deficient channel, and its computation complexity is decreasing with increasing rank of channel matrices. The simulation indicates that the new scheme performance is consistent with that of the traditional method for full-rank channels. Compared with the SVD precoder, the BER performance of the proposed precoder is better with reduced computation complexity.

关 键 词：多输入多输出 预编码 迫零 非满秩 

分 类 号：TN911.22[电子电信—通信与信息系统]